Mike and Molly decide to try having a baby. Carl is upset to learn Molly has been spending time with his ex-girlfriend Christina.
Molly is frustrated when she realizes Mike has a weird face on each of their wedding photos. Carl is worried when Christina's ex-husband shows up.
Joyce bails when Vince throws out his back, forcing Mike and Molly to take care of him. Meanwhile, the newlyweds also have trouble writing personalized thank-you notes for their wedding gifts.
Mike and Molly prepare to return home from their honeymoon, and Mike seems to be a changed man. Meanwhile, Carl is frustrated by not hearing from Mike, and Molly's family spend their last moments getting drunk before the newlyweds return home.moreless
Mike and Molly have to deal with several problems as they make their way to the altar.
Two days before their wedding, Mike and Molly arrange their wedding rehearsal which turns into a disaster.
Mike's dad comes to town early to attend Mike's bachelor party, which prompts Peggy to attend Molly's bachelorette event.
Molly is put in a state of shock when she can't fit in her wedding dress just three weeks before the wedding.
Molly and Mike are left without a wedding chapel when Molly's attitude doesn't sit well with the priest.
When Peggy goes out of town, she leaves Jim with Mike and Molly in an effort to have them practice what having kids will be for them.
Mike is frustrated when Molly suggests they write their own wedding vows, and Carl comes up with an interesting approach to the task.